LI Lei1, ZHAO Ping1, LIANG Ling2, ZHANG Jun3, HE Xuelian2, CHEN Ming1, CHEN Faen1, WANG Zepeng1, HU Deyong1, WANG Dafu1, HUANG Yi1, PAN Qiquan1, WAN Daxue1, LIU Song1
（1. No. 105 Geological Team, Guizhou Provincial Bureau of Geology and Mineral Exploration and Development, Guiyang 550018, China;
2. Guizhou center of environmental engineering assessment, Guiyang 550002, China;
3. Guizhou Zijin Mining Co. Ltd, Zhenfeng 562200, China）
Abstract: In this study, soil environmental geochemistry survey and evaluation of heavy metals (As, Cd, Cr, Cu, Hg, Ni, Pb, Zn) at the Huijiabao Au mine field, Guizhou province, China, was conducted to understand the geochemical background and contamination status. The results showed that most of the soils are of high As and Cu environmental geochemistry grades (third, fourth, and fifth grade) base on the risk screening values in “agricultural land environmental quality standards of soil pollution risk control”. Other heavy metal elements (Cd, Cr, Hg, Ni, Pb, Zn) showed low soil environmental geochemistry grades (first and secondary grade). The areas with high soil Cu environmental geochemistry grades (third grade) showed no spatial correspondence relationships with strata, faults, and deep concealed Au orebodies. The origin of Cu in soil is mainly from the rocks in the mine field. The areas with high soil As environmental geochemistry grades (third, fourth, and fifth grade) were distributed along the anticlinal axis and related fault zones and displayed high relationships with deep concealed orebodies. In addition, it shows on spatial correspondence relationships with the existing mining areas. High As soil at the Huijiabao gold mine field was a result of the Au mineralization.
Key words: soil; heavy metal; geochemical background; environmental evaluation; Huijiabao
EARTH AND ENVIRONMENT Vol.48, No.6, Tot No.338, 2020, Page 719-727
